How much more performance will I see with a new Magnaflow Catback (not magna packs) system vs. just puting on some super 40s for my 03 GT? Is it worth the extra 250-300 for a catback? I also plan on a CAI very soon also. I want the regular catback over the Magna packs because I like a more subtle mellow tone for exhaust.

 

for an 03 GT? for the love of god, go with a flowmaster 40 series. it sounds SOOOOOOOOOOOOOO INCREDIBLY FREAKIN GOOD on the 2v's and if i had a 2v i would put that exhaust on it. i wish i did, but you can't get a 3v to have that sound.

 

flowmasters sound good at lower RPM and idle, but they drone out when you get up in the power band and sound like ***.